Convert remaining StringToLowerASCII to ToLowerASCII

ui/chromeos/network/network_connect.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/chromeos/network/network_connect.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 591 matching lines @@
   }
   if (error == shill::kErrorEapRemoteTlsFailed) {
     return l10n_util::GetStringUTF16(
         IDS_CHROMEOS_NETWORK_ERROR_EAP_REMOTE_TLS_FAILED);
   }
   if (error == shill::kErrorPppAuthFailed) {
     return l10n_util::GetStringUTF16(
         IDS_CHROMEOS_NETWORK_ERROR_PPP_AUTH_FAILED);
   }
 
-  if (base::StringToLowerASCII(error) ==
-      base::StringToLowerASCII(std::string(shill::kUnknownString))) {
+  if (base::ToLowerASCII(error) == base::ToLowerASCII(shill::kUnknownString)) {
     return l10n_util::GetStringUTF16(IDS_CHROMEOS_NETWORK_ERROR_UNKNOWN);
   }
   return l10n_util::GetStringFUTF16(IDS_NETWORK_UNRECOGNIZED_ERROR,
                                     base::UTF8ToUTF16(error));
 }
 
 void NetworkConnectImpl::ShowNetworkSettingsForPath(
     const std::string& service_path) {
   const NetworkState* network = GetNetworkState(service_path);
   delegate_->ShowNetworkSettingsForGuid(network ? network->guid() : "");
@@ skipping 24 matching lines @@
   return g_network_connect;
 }
 
 NetworkConnect::NetworkConnect() {
 }
 
 NetworkConnect::~NetworkConnect() {
 }
 
 }  // namespace ui